| 摘要 |
PROBLEM TO BE SOLVED: To provide a cup-shaped paper container having a bottom face with good flatness, which does not burn even when heated directly with a microwave oven.SOLUTION: A fan-shaped blank comprises a laminated material having a paper layer and thermoplastic resin layers provided on both faces of the paper layer. A cup-shaped paper container is built by sealing a trunk seal portion of the blank, bending four vertical ruled lines, and folding a bottom face portion to form a trunk part having a lower portion in a rectangular shape and an upper portion in a widened shape. In the cup-shaped paper container, the blank has the bottom face portion and a bottom seal portion provided sequentially and continuously from the lower portion of the trunk part via ruled lines. In the bottom face portion, a triangular bottom face plate having a long side is continuously connected to the lower portion of the trunk part, a rectangular bottom face plate, and a fold-in bottom face plate continuously connected to one side of the rectangular bottom face plate and one of short sides of the triangular bottom face plate are arranged via ruled lines. The folding line between the fold-in bottom face plate and the rectangular bottom face plate bulges from an extension line of the vertical ruled line to the rectangular bottom face plate side by an offset width. |
